Post‐Pinatubo optical depth spectra vs. latitude and vortex structure: Airborne tracking sunphotometer measurements in AASE II

P. B. Russell, J. M. Livingston, R. F. Pueschel, John A Reagan, E. V. Browell, G. C. Toon, P. A. Newman, M. R. Schoeberl, L. R. Lait, L. Pfister, Q. Gao, B. M. Herman

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

In January and March 1992, DC‐8‐measured stratospheric particle optical depth spectra, τp(λ), peaked broadly at midvisible or longer wavelengths. At mid‐to‐high northern latitudes outside the vortex, τp(526 nm) above about 11 km was as large as 0.22 in both January and March, reflecting continued Pinatubo volcanic influence. In both months, in‐vortex τp(λ) above 11 km was smaller than outside‐vortex values by a factor of two or more, and in January a strong anticorrelation was observed between τp(λ) and HF column content (an indicator of vortex penetration). In late January at 18–20S, near the edge of the southern subtropical jet, τp(526 nm) above 12 km was only about 0.07–0.09, with a flatter spectral shape than northern mid‐ to high‐latitude measurements in both January and March. Occasional high‐latitude vertical profiles indicate 6–11‐km slab optical depths, Δτp(526 nm), of 0.05 to 0.1, which should be added to the above‐11‐km values to yield values above 6 km.

Original languageEnglish (US)
Pages (from-to)2571-2574
Number of pages4
JournalGeophysical Research Letters
Volume20
Issue number22
DOIs
StatePublished - 1993

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Post‐Pinatubo optical depth spectra vs. latitude and vortex structure: Airborne tracking sunphotometer measurements in AASE II'. Together they form a unique fingerprint.

  • Cite this

    Russell, P. B., Livingston, J. M., Pueschel, R. F., Reagan, J. A., Browell, E. V., Toon, G. C., Newman, P. A., Schoeberl, M. R., Lait, L. R., Pfister, L., Gao, Q., & Herman, B. M. (1993). Post‐Pinatubo optical depth spectra vs. latitude and vortex structure: Airborne tracking sunphotometer measurements in AASE II. Geophysical Research Letters, 20(22), 2571-2574. https://doi.org/10.1029/93GL03006